[填空题]
A potter’s wheel is j:jw.qs. h9vubh5bvmsdz/ 3(rotating around a vertical axis throughb2 g4ae88ip ckp/v1jz its center at a frequency of 1.5rev/s The wheel can be considered a uniform disk of mass 5.0 kg and diameter 0.40 m. The potter then throws a 388ec 4k gzbjv a/i21pp.1-kg chunk of clay, approximately shaped as a flat disk of radius 8.0 cm, onto the center of the rotating wheel. What is the frequency of the wheel after the clay sticks to it? $rev/s$